I have a Lenovo X1 Carbon 7th Generation running Ubuntu 18.04.2 LTS.
I am unable to use the internal microphone, as the device does not appear to be detected at all by the system settings:
pavucontrol, under the “Input Devices” tab I have “Port: Microphone (Unplugged)” as well as “Monitor of Built-in Audio Analog Stereo” with some random static, but no sound signal is actually being picked up (using for example
arecord or any other audio recording software).
In the “Configuration” tab of
pavucontrol, I’m using “Analog Stereo Duplex”, and have tried many other variants with no success.
Other things I’ve tried without success:
/usr/share/pulseaudio/alsa-mixer/paths/analog-output-speaker.conf, as described in this Launchpad Issue. This patch makes the “Internal Microphone” show up in the System Settings, but there is still no audio being detected.
/etc/modprob.d/alsa-base.confusing various different options, as described here, here, and here. Maybe someone has a line that worked for them?
Setting the right channel to silence in
pavucontrol, as described here.
Muting/unmuting the Microphone (which is “Capture”) via
aplay -Loutput is here .
pactl list sourcesoutput is here.
~% cat /proc/asound/cards 0 [PCH ]: HDA-Intel - HDA Intel PCH HDA Intel PCH at 0xea23c000 irq 167
Microphone devices connected via the headphone jack or USB ports work fine, it is only the internal one that is not being picked up. Any help or ideas on getting the internal microphone to work would be greatly appreciated. Thanks.